Product Introduction

This heavy-duty front shell is the main structural housing for the front section of the transmission, designed to withstand the high torque and vibration of heavy-duty operations.

• Structure & Material: Made from high-strength cast iron, it features a precision-machined mating surface for the engine flywheel housing, mounting points for shift cylinders and sensors, and internal supports for bearings and shafts.

• Performance: The rigid cast iron construction provides exceptional structural integrity, while the precision-machined surfaces ensure a leak-free seal and accurate alignment of components.

• Durability: The robust cast iron resists deformation, cracking, and wear, ensuring long service life even under extreme loads and harsh operating conditions.

• Compatibility: Direct OE replacement, fully matching the mounting points and dimensional specifications of the HW19710 transmission.

Core Function

1. Structural Support: Provides the main housing for the front section of the transmission, supporting bearings, shafts, and the clutch mechanism.

2. Engine Connection: Forms the rigid interface between the transmission and the engine, ensuring precise alignment of the clutch and input shaft.

3. Component Mounting: Provides secure mounting points for pneumatic shift cylinders, sensors, and other auxiliary components.

Transmission Front Shell AZ2220000001 – SINOTRUK HW Series Gearbox

When your SINOTRUK HW series gearbox needs a reliable front shell replacement, the Transmission Front Shell AZ2220000001 delivers the precise fit and factory-grade durability your fleet demands. Engineered to match the original specifications of SINOTRUK HOWO heavy-duty trucks, this gearbox front housing ensures smooth power transmission and long-lasting structural integrity — even under the most punishing operating conditions.

At Mettlead, we supply this genuine-equivalent transmission component directly from our factory in China, which means you get competitive pricing without compromising on quality. Whether you are maintaining a single vehicle or managing a large fleet overhaul, this front shell is ready to keep your drivetrain running at peak performance.

Key Features and Benefits of Transmission Front Shell AZ2220000001

Choosing the right gearbox housing is not just about fitment — it is about protecting your entire powertrain investment. Here is what makes this SINOTRUK HW series transmission front shell stand out:

• OEM-Equivalent Precision: Manufactured to match the exact dimensions and tolerances of the original AZ2220000001 front shell, ensuring a seamless bolt-on installation with no modifications required.
• High-Strength Casting Material: Produced from premium-grade aluminum alloy casting that resists cracking, warping, and corrosion — even under extreme thermal cycling and heavy torque loads.
• Reliable Sealing Performance: Precision-machined mating surfaces guarantee a leak-free seal, preventing oil loss and contamination from entering the gearbox internals.
• Extended Service Life: Engineered to withstand sustained vibration and mechanical stress, significantly reducing the frequency of replacements and lowering your total cost of ownership.
• Strict Quality Control: Every unit undergoes dimensional inspection and surface integrity testing before shipment, so you receive a component that meets or exceeds factory standards.
• Direct Factory Pricing: By sourcing directly from Mettlead, you eliminate middlemen markups while still receiving professional packaging and fast logistics support.

Technical Specifications — AZ2220000001 Transmission Front Shell

Below you will find the detailed parameters for this SINOTRUK HW series gearbox front shell. These specifications help you verify compatibility and confirm this is the exact part your application requires:

Application Scenarios — Which Vehicles Fit This Transmission Front Shell?

The Transmission Front Shell AZ2220000001 is specifically designed for the SINOTRUK HW series gearbox, which is widely used across multiple heavy-duty truck platforms. If your vehicle runs an HW-series transmission, this front housing is your direct replacement solution.

Compatible vehicle and gearbox applications include:

• SINOTRUK HOWO A7 heavy-duty tractor units equipped with HW19710 transmission
• SINOTRUK HOWO 6×4 and 8×4 dump trucks with HW15710 gearbox
• SINOTRUK SITRAK C7H series utilizing HW series transmissions
• Various SINOTRUK HOWO mining and construction vehicles running HW gearboxes
• Other SINOTRUK-platform trucks where AZ2220000001 is specified in the parts catalogue

In other words, whether your trucks haul cargo on highways, carry heavy loads through mining sites, or move materials on construction projects, this transmission front shell keeps the gearbox protected and properly aligned throughout every shift.

Explore our full range of gearbox parts and SINOTRUK HOWO gearbox components to find additional transmission parts you may need for a complete overhaul.

OEM/ODM Capabilities and Custom Packaging

Mettlead understands that different markets have different requirements. That is why we offer flexible customization options alongside our standard supply:

• White-Label Supply: We can ship the Transmission Front Shell AZ2220000001 without branding, allowing you to apply your own labels and sell under your house brand.
• Custom Packaging: Need specific box sizes, language labels, or branded cartons? Our team handles custom packaging requests to match your market presentation standards.
• Bulk Order Support: Whether you need 10 pieces or 500, we scale production to meet your procurement timeline without sacrificing inspection standards.
• Technical Support: Our engineering team can provide dimensional drawings and material certificates upon request, giving your customers confidence in the component they are installing.

For more SINOTRUK HOWO truck parts and spare parts, browse our dedicated brand page to discover the complete catalogue available from stock.

Customer Case Study — Transmission Front Shell AZ2220000001 in Action

A fleet management company based in East Africa reached out to Mettlead after experiencing repeated failures with locally sourced gearbox housings on their SINOTRUK HOWO A7 tractor fleet. Their trucks operate daily on heavy-haul routes, and substandard transmission front shells were cracking within months, leading to costly downtime and oil leaks that damaged internal gear components.

After switching to the Transmission Front Shell AZ2220000001 supplied by Mettlead, the client reported zero housing failures across 14 trucks over a 12-month period. The dimensional accuracy eliminated the installation alignment issues they had previously struggled with, and the improved casting quality handled the constant vibration of their demanding routes without any signs of stress cracking.

Moreover, by ordering directly from our factory at competitive pricing, the client reduced their per-unit transmission housing cost by approximately 30% compared to their previous supplier — all while receiving parts that consistently passed their incoming quality inspection. Today, they continue to order SINOTRUK HW series gearbox components from Mettlead on a quarterly basis.

Frequently Asked Questions — Transmission Front Shell AZ2220000001

What is the function of the transmission front shell in an HW series gearbox?

The transmission front shell serves as the primary structural housing at the front of the gearbox assembly. It encloses and protects the input shaft bearings, synchronizer mechanisms, and the front gear train. Additionally, it provides the mounting interface that connects the gearbox to the engine flywheel housing. A damaged or worn front shell can lead to misalignment, oil leaks, and accelerated wear on internal transmission components.

How do I confirm that AZ2220000001 fits my specific SINOTRUK truck?

The most reliable method is to cross-reference the OEM part number AZ2220000001 against your vehicle’s original parts catalogue or the gearbox nameplate. If you are unsure, simply send us your truck model, VIN number, and gearbox model number — our technical team will verify compatibility before you place your order.

Is this transmission front shell an original SINOTRUK part or an aftermarket replacement?

This is a high-quality aftermarket replacement manufactured to OEM specifications. It matches the original AZ2220000001 in dimensions, material composition, and performance characteristics. Every unit passes strict quality control inspections to ensure it meets or exceeds the factory standard.

What causes a transmission front shell to fail prematurely?

Common causes include excessive engine vibration from worn mounts, improper torque during installation, thermal fatigue from repeated overheating cycles, and impact damage from road debris or operational collisions. Using a quality replacement like the AZ2220000001 front shell from Mettlead — combined with correct installation torque specs — significantly reduces the risk of premature failure.

Can I order a sample before committing to a bulk purchase?

Absolutely. We welcome sample orders with a minimum quantity of just one piece. This allows you to inspect the casting quality, verify fitment on your vehicle, and assess overall craftsmanship before scaling up your procurement.

How should I store the transmission front shell before installation?

Store the front shell in a dry, covered environment away from direct moisture and corrosive chemicals. Keep it in its original packaging until you are ready to install. Avoid stacking heavy objects on top of the housing to prevent stress on the mating surfaces.

Ready to Source Your Transmission Front Shell AZ2220000001?

Stop wasting time and money on unreliable gearbox housings. The Transmission Front Shell AZ2220000001 for SINOTRUK HW series gearboxes is in stock and ready to ship from Mettlead’s warehouse — with factory-direct pricing, professional packaging, and responsive support from our parts specialists.

Get your competitive quote today. Simply contact us with your required quantity and delivery destination, and our team will respond within 24 hours with pricing, lead time, and shipping options tailored to your needs.

Mettlead — Your trusted factory-direct source for SINOTRUK, HOWO, SITRAK, SHACMAN, and more Chinese heavy truck parts worldwide.